Stoichiometry

Pick out the wrong unit conversion.

pH value of a solution containing equal concentration of hydroxyl and hydrogen ions will be

No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules

In case of vapor-liquid equilibria, which of the following does not account for gas phase deviation from ideality?

Pick out the wrong statement:

Which of the following ideal gas laws are not applicable to mixture of gases ?

Atmospheric pressure corresponds to a hydrostatic head of

Compressibility factor of a real gas is the ratio of the actual volume to that predicted by ideal gas law. As the pressure of the gas approaches zero, the compressibility factor approaches

In __________ process, ions of salts react with water to produce acidity or alkalinity.

A reduction process is accompanied with increase in the

In physical adsorption, as compared to chemisorption, the

Pick out the wrong unit conversion of calorific value.

What fraction of the total pressure is exerted by oxygen, if equal weights of oxygen and methane are mixed in an empty vessel at 25°C?

For any system, the __________ heat of solution is dependent on the temperature and the adsorbate concentration.

For most salts, the solubility increases with rise in temperature, but the solubility of __________ is nearly independent of temperature rise.

Dry air is a mixture of

The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the

Internal energy is independent of the __________ for an ideal gas.

Viscosity of atmospheric air may be about __________ centipoise.

Solutions having the same osmotic pressure are called __________ solutions.

In general, the specific heats of aqueous solutions __________ with increase in the concentration of the solute.

Pick out the wrong conversion formula for the conversion of weight units :

The amount of Zn (atomic weight = 65) required to form 224 c.c. of H 2 at N.T.P. on treatment with dilute H 2 SO 4 will be __________ gm.

Measurement of the amount of dry gas collected over water from volume of moist gas is based on the

Pick out the wrong statement about the recycle stream in a process.

In a chemical process, the recycle stream is purged for

Air at a temperature of 20°C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity? Vapour pressure of water at 20°C is 17.5 mm Hg.

Validity of the relationship, inputs = outputs, holds good for the system at steady state

The crystallisation of a solute from a solution may be done by

'Giga' stands for

The vapor pressure of liquids (having similar chemical nature) at any specified temperature __________ with increasing molecular weight.

__________ chart is a graph related to Antonie equation.

Sodium __________ has inverted solubility curve i.e. its solubility increases with the lowering of temperature.

Normality of a solution does not change with the increase in the

Unit of power is

For water evaporating into usaturated air under adiabatic conditions and at constant pressure, the __________ remains constant throughout the period of vaporisation.

Molality is defined as the number of gm moles of solute per __________ of solvent.

For a neutral solution (pH = 7), the value of [H + ] [OH - ] is equal to

Vapor pressure of a solution is proportional to (where, S v and S t are mole fraction of solvent and solute respectively).

Pick out the wrong unit conversion of heat transfer rate.

A fluid gas produced on burning furnace oil contains 0.15 gm mole of CO 2 , 0.05 gm mole of oxygen and 0.80 gm mole of N 2 . What is its molecular weight?

Colligative properties of a dilute solution are those, which depend entirely upon the

Colligative properties of a dilute solution are those which depend entirely upon the

Osmotic pressure exerted by a solution prepared by dissolving one gram mole of a solute in 22.4 litres of a solvent at 0°C will be __________ atmosphere.

The OH - concentration in a solution having pH value 3 is

The viscosity of water at room temperature may be around one

A vapor that exists above its critical temperature is termed as a __________ vapor.

A gas at 0°C was subjected to constant pressure cooling until its volume became half the original volume. The temperature of the gas at this stage will be

A gas at 0°C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be

Which of the following is not a unit of kinematic viscosity?

Pick out the wrong statement.

Ideal solution is formed, when its components have zero

The heat evolved in the combustion of benzene is represented by the equation: C 6 H 6 + 7.5O 2 = 6CO 2 + 3H 2 O, ΔH = 3264.6 kJ/kg.mole The heat energy change, when 39 gm of C 6 H 6 is burnt in an open container, will be __________ kJ/kg.mole.

1 bar is almost equal to __________ atmosphere.

Which of the following expressions defines the Baume gravity scale for liquids heavier than water?

Which of the following gravity scales is used exclusively for liquids heavier than water?

Which of the following expressions defines the Baume gravity scale for liquids lighter than water?

An azeotropic solution of two liquids has boiling point lower than either of them, when it

A chemical process is said to occur under unsteady state, if the

In a binary liquid solution of components A and B, if component A exhibits positive deviation from Raoult's law, then component B

Number of gm moles of solute dissolved in one litre of a solution is called its

A perfectly insulated container of volume V is divided into two equal halves by a partition. One side is under vacuum, while the other side has one mole of an ideal gas (with constant heat capacity) at 298 K. If the partition is broken, the final temperature of the gas in the container

How many phases are present at eutectic point?

Avogadro's number is equal to

Enthalpy of a vapor gas mixture may be increased by increasing the

In osmosis through a semi-permeable membrane, diffusion of the

Isotonic solutions must have the same

The unit of C p in S.I. units is

The rate of material __________ is zero in case of a steady state system.

Volume percent for gases is equal to the

Kopp's rule is concerned with the calculation of

Pick out the correct conversion.

1 gm mole of methane (CH 4 ) contains

N 2 content in a urea sample was found to be only 42%. What is the actual urea content of the sample? (molecular weight of urea = 60)

Pure oxygen is mixed with air to produce an enriched air containing 50 volume % of oxygen. The ratio of moles of air to oxygen used is

__________ equation gives the effect of temperature on heat of reaction.

The most convenient way of expressing solution concentration is in terms of

For a given mass of a gas at constant temperature, if the volume 'V' becomes three times, then the pressure 'P' will become

For an ideal solution, the total vapor pressure varies __________ with the composition(expressed as mole fraction).

N.T.P. corresponds to

If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times.

The atomic heat capacities of all solid elements __________ with decrease in temperature.

At higher temperature, molal heat capacities of most of the gases (at constant pressure) __________ with increase in temperature.

At higher temperatures, molal heat capacities for most of the gases (at constant pressure) __________ with increase in temperature.

Assuming that CO 2 obeys perfect gas law, calculate the density of CO 2 (in kg/m 3 ) at 263°C and 2 atm.

1 Pascal (unit of pressure) is equal to __________ N/m 2 .

The unit of specific heat at constant pressure, C p , in SI unit is

C p - C v , for an ideal gas is equal to

With increase in temperature, the surface tension of water

The temperature of a gas in a closed container is 27° C. If the temperature of the gas is incresed to 300° C, then the pressure exerted is

1 kg/m 2 is equal to __________ mm water column.

Which of the following terms of Vander Walls equation of state for a non-ideal gas accounts for intermolecular forces?

Osmotic pressure of a dilute solution of a non volatile solute in a solvent obeying Raoult's law is proportional to the

500 c.c. each of hydrogen at 700 mm Hg pressure and oxygen at 600 mm Hg pressure are put together in a vessel of 1 litre capacity. The final pressure of the gas mixture will be __________ mm Hg.

°API gravity of water at N.T.P. is about

Enthalpy of formation of NH 3 is -46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH 3 → N 2 + 3H 2 , is equal to __________ kJ/kg. mole.

Variation of vapor pressure with temperature can be calculated using Clausius-Clapeyron equation, which assumes that the

Kinematic viscosity of 1 m 2 /second is equivalent to __________ stokes.

The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation

Unit of mass velocity is

Real gases approach ideal behaviour at

Avogadro number is the number of molecules in one __________ of a gas.

The number of atoms of oxygen present in 11.2 litres of ozone (O 3 ) at N.T.P. are

The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. The temperature at which the above mixture will exert a pressure of one standard atm. is

Roult's law is obeyed by a __________ solution.

The quantity of heat required to evaporate 1 kg of a saturated liquid is called

A car tyre of volume 0.057 m 3 is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and C v for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is

The chemical nature of an element is independent of

The osmotic pressure of a solution increases, if its __________ is decreased.

'Cox' chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the

pH value of a solution containing 1 gm of hydrogen ion per litre will be

Weight of 56 litres of ammonia at N.T.P. is __________ gm.

During a phase change process like sublimation, vaporisation, melting etc., the specific __________ does not change.

Pick out the correct statement.

Claussius Clapeyron equation applies to the __________ process.

Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent?

Assume that benzene is insoluble in water. The normal boiling points of benzene and water are 80.1 and 100°C respectively. At a pressure of 1 atm, the boiling point of a mixture of benzene and water is

Applicability of Claussius-Clapeyron equation is subject to the condition that the

A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the

The heats of vaporisation of CS 2 , C 2 H 5 OH & H 2 O are 26.8, 38.6 & 40.6 KJ/kg mole respectively. The order of decreasing inter-molecular forces in these liquids is

The heat of adsorption of a gas caused by Van der Walls forces of attraction and capillarity is equal to the heat of

__________ equation relates latent heat and boiling point.

Average molecular weight of air is about

If 1 Nm 3 of O 2 contains 'N' number of molecules, then number of molecules in 2 Nm 3 of SO 2 will be

1 kcal/kg.°C is equivalent to __________ BTU/lb.°F.

The density of a gas at N.T.P.is 'ρ'. Keeping the pressure constant (i.e. 760 mm Hg), the 3 density of the gas will become ¾ 0.75ρ at a temperature of __________ °K

An oxidation process is accompanied by decrease in the

1 torr is equal to __________ mm Hg column.

Viscosity of 1 centipoise is equal to 1 centis-toke in case of

C v for monoatomic gases is equal to(where, R = gas constant)

The equilibria relations in a multicom-ponent and multiphase system can not be calculated with the help of the

Solutions which distil without change in composition are called

A saturated vapor on being compressed would

One of the specific gravity scales is "Brix" (used speicifically for sugar solution). It is defined as

Which of the following is an exothermic reaction?

Which of the following is not a unit of pressure?

Pick out the wrong unit conversion of temperature.

On mixing 56 gm of CaO with 63 gm of HNO 3 , the amount of Ca(NO 3 ) 2 formed is __________ gm.

Degrees of freedom will be equal to the number of components for a system comprising of

Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is x B and the vapour pressures of benzene and water at these conditions are P v B and P v w respectively. The partial pressure of benzene in air-vapour mixture is

According to the kinetic theory, the thermal conductivity of a monoatomic gas is proportional to

How much O 2 can be obtained from 90 kg of water?

Which of the following has the smallest least effect on the solubility of a solute into the solvent?

Atoms of the same element, but of different masses are called

Elements in a periodic table are arranged in order of their

For an ideal gas, the compressibility factor

The effect of pressure on the heat capacity of the gases __________ is negligible.

Gases diffuse faster compared to liquids because of the reason that the liquid molecules

The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is

The gravimetric (i.e., by weight) composition of a vapor saturated gas is independent of the

Assuming applicability of ideal gas law, the pure component volume of the vapor in a saturated gas can be calculated from theoretical relationship. The volumetric composition of a vapor saturated gas is independent of the

The heat capacity of most substances is greater for the __________ state.

Addition of a non-volatile solute to a pure solvent

A sample of well water contains 140 gm/m 3 Ca 2+ ions and 345 gm/m 3 Na + ions. The hardness of the sample of water, expressed in terms of equivalent CaCO 3 in gm/m 3 is (assuming atomic masses of Ca : 40, Na : 23, C : 12, O : 16)

The molecules of a liquid which is in equilibrium with its vapor at its boiling point on an average have equal __________ in the two phases.

The total number of atoms in 8.5 gm of NH 3 is __________ × 10 23 .

Which of the following holds good for a solution obeying Raoult's law (i.e., an ideal solution) (where, ΔH = heat of mixing, and ΔV = volume change on mixing ) ?

Number of gm moles of solute dissolved in 1 kg of solvent is called its

If pH value of a solution is 8, then its pOH value will be

Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the

For estimation of heat capacity of a solid compound, one can use

Dissolving a solute in a solvent does not change its

Molar heat capacity of water in equilibrium with ice at constant pressure is

The weight fraction of methanol in an aqueous solution is 0.64. The mole fraction of methanol X M satisfies

The pressure under which liquid and vapor can co-exit at equilibrium is called the __________ vapor pressure.

A compound was found having nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. The formula of the compound is

The molar composition of a gas is 10% H 2 , 10% O 2 , 30% CO 2 and balance H 2 O. If 50% H 2 O condenses, the final mole percent of H 2 in the gas on a dry basis will be

A gaseous mixture contains 14 kg of N 2 , 16 kg of O 2 and 17 kg of NH 3 . The mole fraction of oxygen is

On addition of 1 c.c. of dilute hydrochloric acid (1% concentration) to 80 c.c. of a buffer solution of pH = 4, the pH of the solution becomes

At room temperature, the product [H + ] [OH - ] in a solution is 10 -14 moles/litre. If, [OH - ] = 10 -6 moles/litre, then the pH of the solution will be

An aqueous solution of 2.45% by weight H 2 SO 4 has a specific gravity of 1.011. The composition expressed in normality is

The hydroxyl ion (OH - ) concentration in a solution having pH value 3 will be

1 BTU/lb.←°F is equivalent to __________ kcal/kg.°C.

A solution with reasonably permanent pH is called a/an __________ solution.

A long cylinder and a sphere both of 5 cms diameter are made from the same porous material. The flat ends of cylinder are sealed. Both the cylinder and sphere are saturated with the same solution of sodium chloride. Later both the objects are immersed for a short and equal interval of time in a large tank of water which is well agitated. The fraction of salt remaining in the cylinder and the sphere are X c and X s respectively. Which of the following statement is correct?

pH value of an alkaline solution is

A very dilute solution is prepared by dissolving 'x 1 ' mole of solute in 'x 2 ' mole of a solvent. The mole fraction of solute is approximately equal to

Heat of solution in a system in which both solute and solvent are liquids is termed as

Mass number of an atom is the sum of the numbers of

The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.

The molecular velocity of a real gas is proportional to (where, T = absolute temperature of the gas).

With rise in pressure, the solubility of gases in solvent, at a fixed temperature

Total energy at a point comprises of __________ energy.

The reverse process of fractional crystallisation is called

One micron is equal to

One 'Therm' is equivalent to

Refluxing of part of the distillate in a fractionating column is a 'recycling operation', aimed primarily at

Isotopes are atoms having the same

One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH 4 + 2O 2 → CO 2 + 2H 2 O. Both the reactants and products are in gas phase. ΔH° 298 = -730 kJ/mole of methane. If the average specific heat of all the gases/vapour is 40 J/mole.K, the maximum temperature rise of the exhaust gases in °C would be approximately equal to

The pressure of 'V' litres of a dry gas is increased from 1 to 2 kgf/cm 2 at a constant temperature. The new volume will become

The temperature at which the second Virial co-efficient of a real gas is zero is called the

The depression in freezing point of a solution is

In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is

Saturated molal absolute humidity of the vapor-gas mixture depends upon the

6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H 2 produced will be __________ gm.

One micron is equal to __________ cm.

Pick out the wrong unit conversion of thermal conductivity.

Kopp's rule is helpful in finding the

The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the

Equal masses of CH 4 and H 2 are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is

The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour

An ideal gas can be liquified, because

The value of the gas-law constant 'R' is 1.987

Volume occupied by one gm mole of a gas at S.T.P. is

The number of H + in 1 c.c solution of pH 13 is

The density of a liquid is 1500 kg/m 3 . Its value in gin/litre will be equal to

One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH 4 + 2O 2 → CO 2 + 2H 2 O. Both the reactants and products are in gas phase. ΔH° 298 = -730 kJ/mole of methane. Mole fraction of water vapour in the product gases is about

The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. If, at a total pressure of one standard atm. exerted by the vapours of water and toluene, the mole fraction of water X w in the vapour phase satisfies

Heat of transition is the heat evolved or absorbed, when a substance is converted from

__________ fuels require the maximum percentage of 'excess air' for complete combustion.

Atomic __________ of an element is a whole number.

A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal

The vapour pressure of water is given by, in P sat = A - (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K.The vapor pressure of water in atm. at 50°C is approximately

An equation for calculating vapour pressure is given by, log 10 P = A - B(t + c). This is called the

The combustion equations of carbon and carbon monoxide are as follows: C + O 2 = CO 2 , ΔH = -394 kJ/kg.mole CO + $$frac{1}{2}$$O 2 = CO 2 , ΔH = -284.5 kJ/kg.mole The heat of formation of CO is __________ kJ/kg.mole.

In case of a ternery system involving two liquid components and a solute, the ratio of the concentration of the solute in the two phases at equilibrium is called the distribution co-efficient. The distribution co-efficient depends upon the

Density of carbon dioxide is __________ kg/Nm 3 .

Enthalpy change resulting, when unit mass of solid is wetted with sufficient liquid, so that further addition of liquid produces no additional thermal effect, is called the heat of

The elevation in boiling point of a solution is proportional to the __________ of the solution.

A gas occupies a volume of 283 c.c at 10°C. If it is heated to 20°C at constant pressure, the new volume of the gas will be __________ c.c.

The latent heat of vaporisation

A solution is made by dissolving 1 kilo mole of solute in 2000 kg of solvent. The molality of the solution is

If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its

If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will

Disappearance of snow in subzero weather exemplifies the process of

At 100°C, water and methylcyclohexane both have vapour pressures of 1 atm. Also at 100°C, the latent heats of vaporisation of these compounds are 40.63 kJ/mole for water and 31.55 kJ/mole for methylcyclohexane. The vapour pressure of water at 150°C is 4.69 atm. At 150°C, the vapour pressure of methylcyclohexane would be expected to be

If a solution of eutectic composition is cooled, __________ reaching the eutectic temperature.

If 1.5 moles of oxygen combines with aluminium to form Al 2 O 3 , then the weight of aluminium (atomic weight = 27) used in this reaction is __________ gm.

Hess's law of constant heat summation is based on conservation of mass. It deals with

Except for monoatomic gases, the molal heat capacity at constant volume for all gases is __________ Kcal/Kg mole.° K.

Addition of a non-volatile solute to a solvent produces a __________ in its solvent.

The temperature at which a real gas obeys Boyle's law is termed as the

A vapor whose partial pressure is less than its equilibrium vapor pressure is called the __________ vapor.

The osmotic pressure of a solution is directly proportional to the

At a temperature of 0°K, the molecules of a gas have only __________ energy.

Raoult's law is not applicable to the

Which of the following is not a colligative property?

The value of Trouton's ratio $$left( {frac{{{lambda _{ ext{b}}}}}{{{{ ext{T}}_{ ext{b}}}}}}
ight)$$ xa0for a number of substances is 21 (where, $${{lambda _{ ext{b}}}}$$ = molal that of vaporisation of a substance at its normal boiling point, kcal/kg.mole and T b = normal boiling point, °K). The Kis-tyakowsky equation is used for calculation of Trouton's ratio of __________ liquids.

pH value of H 2 SO 4 (5% concentration) is

Pick out the wrong unit conversion of heat transfer co-efficient.

Pick out the wrong unit conversion of mass transfer co-efficient.

With increase in the temperature of pure (distilled) water, its

As per Kirchoff s equation, the heat of reaction is affected by the

Size range of the colloidals particles is

In a binary liquid system, the composition expressed as __________ is independent of the temperature & pressure.

The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be __________ times.

Which of the following is followed by an ideal solution ?

According to Raoult's law, "The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component." Raoult's law is not applicable under the following assumption/condition.

The total volume occupied by a gaseous mixture is equal to the sum of the pure component volumes. This is the __________ law.

S.T.P. corresponds to

The vapor pressures of benzene and toluene are 3 and $$frac{4}{3}$$ atmospheres respectively. A liquid feed of 0.4 moles of benzene and 0.6 moles of toluene is vapourised. Assuming that the products are in equilibrium, the vapor phase mole fraction of benzene is

Raoult's law states that 'the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component'. This generalisation is based on the assumption that the

Kopp's rule is useful for the determination of

Heat capacity of air can be approximately expressed as, C p = 26.693 + 7.365 × 10 -3 T, where, C p is in J/mole.K and T is in K. The heat given off by 1 mole of air when cooled at atmospheric pressure from 500°C to -100°C is

A sugar solution containing __________ percent sugar is equivalent to 1 Brix.

Methane is mixed with stoichiometric proportion of oxygen and completely combusted. The number of additional specifications required to determine the product flow rate and composition is

The heat of solution depends upon the

A butane isomerisation process produces 70 kmole/hr of pure isobutane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be

Kinetic theory of gases stipulates that, the

At what temperature, given mass of a gas that occupies a volume of 2 litres at N.T.P. will occupy a volume of 4 litres, if the pressure of the gas is kept constant?

40 gms each of the methane and oxygen are mixed in an empty container maintained at 40°C. The fraction of the total pressure exerted by oxygen is

The vapor pressure of water at 100°C is

A bypass stream in a chemical process is useful, because it

Which of the following ratios defines the recycle ratio in a chemical process?

Heat of reaction is a function of the

Heat of reaction is not influenced by

Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules

Which of the following gases will have the- highest kinetic energy per mole at the same pressure & temperature?

Osmotic pressure of the solution can be increased by

The net heat evolved or absorbed in a chemical process, i.e. total change in the enthalpy of the system is independent of the

The unit of dynamic viscosity is

The heat capacity of a substance is

A rigid vessel containing three moles of nitrogen gas at 30°C is heated to 250°C. Assume the average capacities of nitrogen to be C p = 29.1 J/mole.°C and, C v = 20.8 J/mole.°C. The heat required, neglecting the heat capacity of the vessel, is

__________ kg of CaCO 3 on heating will give 56 kg of CaO.

The temperature at which real gases obey the ideal gas law over a wide range of pressure is called the __________ temperature.

The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be

The average translational kinetic energy with which a gas molecule is endowed is dependent on its

Concentration of a solution expressed in terms of __________ is independent of temperature.

Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the

Which of the following gases is the most soluble in water?

Internal energy of a substance comprises of the __________ energy.

At a constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with rise of temperature due to

Which of the following is insensitive to changes in pressure?

Number of gram equivalent of solute dissolved in one litre of solution is called its

1 kg of calcium carbide (CaC 2 ) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour?

Heat of neutralisation of HCl and NaOH is - 57.46 kJ/Kg mole. The heat of ionisation of water will be __________ kJ/Kg mole.

The increase in the temperature of the aqueous solution will result in decrease of its

Which of the following is not a unit of length?

1 BTU/ft 3 is approximately equal to __________ kcal/m 3 .

1 gm mole of an alcohol whose molecular weight is 74 contains 48 gms of carbon, 10 gms of hydrogen and 16 gms of oxygen. Its molecular formula is

The value of (C p - C v ) for a real gas obeying Vander Wall's equation is

For an endothermic reaction, the minimum value of energy of activation will be (where, ΔH = enthalpy of the reaction)

Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m 3 . The diffusivity of aniline in air is 0.74 × 10 -5 m 2 /s. The numerical value of mass transfer co-efficient is 7.4 × 10 -3 . Its units are

Vapor pressure of water at 100°C is about __________ bar.

1 m 3 is approximately equal to

80 kg of Na 2 SO 4 (molecular weight = 142) is present in 330 kg of an aqueous solution. The solution is cooled such that. 80 kg of Na 2 SO 4 .10H 2 O crystals separate out. The weight fraction of Na 2 SO 4 in the remaining solution is

Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because

What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-xylene at 100°C, if their vapor pressures at 100°C are 1340, 560 and 210 mmHg respectively?

A solution of specific gravity 1 consists of 35% A by weight and the remaining B. If the specific gravity of A is 0.7, the specific gravity of Bis

Recycling in a chemical process facilitates

With rise in temperature, the solubility of ammonia in water at a fixed pressure

A solution having a pH value of 5 is less acidic than the one having a pH value of 2 by a factor of

C p is expressed in S.I. unit as

The number of water molecules present in a drop of water weighing 0.018 gm is 6.023 x __________

1 ata is equivalent to

1 centipoise is equivalent to

1 kg/cm 2 is equal to

1 kgf/cm 2 is not equal to

1 torr is equivalent to

Na 2 SO 4 .10H 2 O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na 2 SO 4 . The final concentration of the solute in the solution is 10%. The weight of crystals is

Two solutions A 1 and A 2 have pH value of 2 and 6 respectively. It implies that the solution

A 'limiting reactant' is the one, which decides the __________ in the chemical reacation.

The heat of vaporisation __________ with increase in pressure.

Simultaneous doubling of the absolute temperature of a gas and reduction of its pressure to half, will result in __________ in the volume of the gas.

CaCO 3 contains __________ percent of Ca by weight.

C p equals C v at

$$frac{{{{ ext{C}}_{ ext{p}}}}}{{{{ ext{C}}_{ ext{v}}}}}$$ for monoatomic gases is

Specific gravity on API scale is given by the relation(where, G = specific gravity at 15.5°C).

In a neutral solution

A vessel of volume 1000 m 3 contains air which is saturated with water vapour. The total pressure and temperature are 100 kPa and 20°C respectively. Assuming that the vapour pressure of water at 20°C is 2.34 kPa, the amount of water vapour (in kg) in the vessel is approximately

In which of the following case of mixing of a strong acid with strong base (each of 1N concentration), temperature increase will be the highest?

In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the

NaOH contains __________ percent oxygen.

Increasing the temperature of an aqueous solution will cause decrease in its

The accumulation in a steady state combustion process, burning 1 kg mole of carbon with 1 kg mole of oxygen thereby producing 1 kg mole of carbon dioxide, is __________ kg mole.

The value of gas constant 'R' is __________ kcal/kg.mole.°C.

Heat of __________ of a fuel is called its calorific value.

Othmer chart is useful in estimating the heat of

In case of a solution (not of a solid in a liquid), whose total volume is less than the sum of the volumes of its components in their pure states, solubility is

In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is

What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20)?

Under conditions of equal reduced pressure and equal reduced temperature, substances are said to be in the 'corresponding states'. At equal reduced conditions i.e., at the corresponding state, the __________ of different gases are nearly the same.

If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is __________ times.

The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements. This is the statement of

In the reaction, represented by Na 2 CO 3 + HCl → NaHO 3 + NaCl, the equivalent weight of Na 2 CO 3 is

Gases having same reduced temperatures and reduced pressures

Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m 3 . The diffusivity of aniline in air is 0.74 × 10 -5 m 2 /s.The numerical value of mass transfer co-efficient is 7.4 × 10 -3 . The rate of evaporation of aniline is 2.97 × 10 -4 . Its units are

A vapor whose partial pressure is less than its equilibrium vapor pressure is called a __________ vapor.

One Newton is equal to __________ dynes.

The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg.?

The average value of heat of neutralisation of dilute solution of strong acids and strong bases is about __________ kcal/kg.mole of water formed.

The heat change for the reaction, C(s) + 2S(s) → CS 2 ($$l$$), is 104.2 kJ. It represents the heat of

Which of the following is not used for computing latent heat of vaporisation?

The equilibrium value of the mole fraction of the gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid surface. This statement pertaining to the solubility of gases in liquid is the __________ law.

2 litres of nitrogen at N.T.P. weighs __________ gms.

A gas mixture contains 6 moles of H 2 and 2 moles of N 2 . If the total pressure of the gaseous mixture is 4 kgf/cm 2

then the partial pressure of N 2 in the mixture will be __________ kgf/cm 2 .

One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m 3 . It cools to 98°C

the saturation pressure is 0.943 bar

one kg of water vapour under these conditions has a volume of 1.789 m 3 . The latent heat of condensation (kJ/kg -1 ) under these conditions is

The vapour pressure of a solution (made by dissolving a solute in a solvent) is __________ that of the pure solvent.

Percentage saturation of a vapor bearing gas is always __________ the relative saturation.

One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m 3 . It cools to 98°C

the saturation pressure is 0.943 bar

one kg of water vapour under these conditions has a volume of 1.789 m 3 . The amount of water vapour condensed (in kg) is

At standard conditions, N 2 + 2O 2 ⇋ 2NO 2
ΔG° = 100 kJ/mole NO + $$frac{1}{2}$$O 2 ⇋ 2NO 2
ΔG° = -35 kJ/mole The standard free energy of formation of NO in kJ/mole is

The vapor pressure of liquids of similar chemical nature at any particular temperature __________ with increase in the molecular weight.

In the reaction, Ca + 2H 2 O = Ca(OH) 2 + H 2
what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water? (atomic weight of calcium = 40)

For the gaseous phase reaction, N 2 + O 2 ⇋ 2NO, ΔH = + 80 kJ/kg.mole
the decomposition of NO is favoured by

Boiling point of a non-homogeneous mixture of immiscible liquids is __________ that of any one of its separate components.

With increase in the solute concentration, the specific heat of aqueous solutions

For a reacation, X → Y, if the concentration of 'X' is tripled
the rate becomes nine times. The order of reaction is

The vapor pressure of a substance, at its melting point, is __________ in the solid state as compared to that in the liquid state.

If the absolute temperature of an ideal gas is tripled and simultaneously the pressure is reduced to one third
then the volume of gas will

With rise in temperature, the heat capacity of a substance

The evaporation of aqueous solution of sugar causes its molarity to

Boiling point of a solution as compared to that of the corresponding solvent is

The density of a gas 'X' is twice that of another gas 'Y'. If the molecular weight of gas 'Y' is 'M'
then the molecular weight of the gas 'X' will be